(CNN) -- A 16-year-old apprentice jockey died Wednesday after being thrown from his horse at a track near Columbus, Ohio, police and track officials said.Josh Radosevich was thrown off the thoroughbred Nyoka during the third race at Beulah Park, in Grove City. Radosevich was trampled by at least two horses after falling, and was pronounced dead at a Columbus hospital, a Grove City police report stated."We mourn the loss of this young and spirited jockey," the track said in a statement issued Wednesday evening.The accident occurred about 1:05 p.m., police said. The teenager was leading the field of 10 when his mount stumbled in the muddy track and pitched him forward.The horse suffered a severe leg fracture and was euthanized at the track, Beulah Park officials said.The remaining 10 races were canceled. Radosevich, who was a sophomore in high school, had recorded 14 wins.Another jockey, Jorge Collazo Jr., was knocked off his horse during a collision following Radosevich's fall. He was treated and released, the track said.